A new O-geranylated chalcone, 2′-hydroxy-2-methoxy-4′-O-[(E)-3,7-dimethyl-2,6-octadienyl] chalcone (1), together with three known flavones, 5-hydroxy-7,2′-dimethoxyflavone (2), skullcapflavone I (3) and echioidin (4), were isolated from the leaves of Andrographis lobelioides. The structure of 1 and the known compounds (2–4) were achieved by extensive 1D and 2D NMR spectral and chemical studies.
DamuAG, JayaprakasamB, GunasekarD. (1998) A new flavone 2′-glucoside from Andrographis alata. Journal of Asian Natural Products Research, 1, 133–138;
8.
DamuAG, JayaprakasamB, RaoKV, GunasekarD. (1998) A flavone glucoside from Andrographis alata. Phytochemistry, 49, 1811–1813;
9.
DamuAG, JayaprakasamB, GunasekarD, BlondA, BodoB. (1999) Two acylated flavone glycosides from Andrographis serpyllifolia. Phytochemistry, 52, 147–151;
10.
JayaprakasamB, DamuAG, GunasekarD, BlondA, BodoB. (1999) Dihydroechioidinin, a flavone from Andrographis echioides. Phytochemistry, 52, 935–937;
11.
JayapraksamB, GunasekarD, RaoKV, BlondA, BodoB. (2001) Androechin, a new chalcone glucoside from Andrographis echioides. Journal of Asian Natural Products Research, 3, 43–48;
12.
JayakrishnaG, Hari KishoreP, RaoCV, GunasekarD, BlondA, BodoB. (2001) Two new 2′-oxygenated flavones from Andrographis elongata. Chemical and Pharmaceutical Bulletin, 49, 1555–1557;
13.
ReddyMVB, Hari KishoreP, RaoCV, GunasekarD, CauxC, BodoB. (2003) New 2′-oxygenated flavonoids from Andrographis affinis. Journal of Natural Products, 66, 295–297;
14.
ReddyMK, ReddyMVB, JayakrishnaG, GunasekarD, CauxC, BodoB. (2003) Two new flavonoids from Andrographis rothii. Chemical and Pharmaceutical Bulletin, 51, 191–193;
15.
ReddyMK, ReddyMVB, GunasekarD, MurthyMM, CauxC, BodoB. (2003) A flavone and an unusual 23-carbon terpenoid from Andrographis paniculata. Phytochemistry, 62, 1271–1275;
16.
Hari KishoreP, ReddyMVB, ReddyMK, GunasekarD, CauxC, BodoB. (2003) Flavonoids from Andrographis lineata. Phytochemistry, 63, 457–461;
17.
ReddyMK, ReddyMVB, ReddyBAK, GunasekarD, CauxC, BodoB. (2003) A new chalcone and a flavone from Andrographis neesiana. Chemical and Pharmaceutical Bulletin, 51, 854–856;
18.
ReddyBAK, ReddyMVB, GunasekarD, MurthyMM, CauxC, BodoB. (2005) Two new flavonoids from Andrographis macrobotrys. Indian Journal of Chemistry, 44B, 1966–1969;
19.
SudhanaJM, MunikishoreR, ReddyMVB, GunasekarD, BlondA, BodoB. (2011) A new diacylated abdane diterpenoid from Andrographis wightiana. Natural Product Communications, 6, 1569–1572.
20.
JalalMAF, OvertonKH, RycroftDS. (1979) Formation of three new flavones by differentiating callus cultures of Andrographis paniculata. Phytochemistry, 18, 149–151.
21.
MabryTJ, MarkhamKR, ThomasMB. (1970) The Systematic Identification of Flavonoids. Springer-Verlag, New York, USA, p.227;
22.
MabryTJ, MarkhamKR, ThomasMB. (1970) The Systematic Identification of Flavonoids, Springer-Verlag, New York, USA, p.267.
23.
SritularakB, LikhitwitayawuidK. (2006) Flavonoids from the pods of Milletia erythrocalyx. Phytochemistry, 67, 812–817.
24.
AgrawalPK. (Ed). (1989), Carbon-13 NMR of Flavonoids. Elsevier, Amsterdam, p. 368.
25.
KozawaM, MoritaN, BabaK, HataK. (1977) The structure of xanthoangelol, a new chalcone from the roots of Angelica keiskei Koiduzumi (Umbelliferae). Chemical and Pharmaceutical Bulletin, 25, 515–516.
